Pipe-wrench



(No Model.)

L. DAHLSTRUM. PIPE WRENCH.

No. 508,920. Y Patented Now/.215 1893.

, Wifgzsses www@ m18 p UNTTED STATES PATENT HOEEICE.

LEOPOLD DA'HLSTROM, OE SANTA CLARA, oALrEOErur-x.`

PIPE-WRENCH.

. SPECIFICATION forming part of Lettersratent No. 508,920, dated Novemberel, 189s. Y n i Application tiled August 15,1893. Serial No.483,194. (No model.)

To all whom it may concern.:

'cal object, and when. in Vposition will bear equally around the entire surface thereof so' as to obviate any marringnor crushing of the same; to arrange for a convenient adjustment of the stock or lever of the Wrench with relation to the teeth of the binding-chain; to provide for a disposition of any surplus chain; and .to provide a new and improved chain for use in connection with the wrench.

With these main and other detail objects in view, the invention consists in certain features of vconstruction hereinafter specified and particularly pointed out in the claims.

.VReferringto the drawingsz-Figure 1 is a perspective view of awrench embodying my `invention,thesarne being in operative position upon a pipe, Ithe latter being shown inL dotted lines. Fig. 2 isla; longitudinal sectional view of the wrench. Fig. 3 is a detail in perspective of a portion of the bindingchain.

Fig. 4 is asimilar view of a modified construction of chain.

Like numerals of reference indicate like parts in all the figures of the drawings.

In practicing my invention I employ a lever or stock 1, which is shaped to form a suitt able hand-hold, and at its lower or operative end terminates in ahead that is thickened or widened as shown and provided withtwo teeth 2 and 3 respectively. Above and in `advance of the teeth an inclined transverse slot 5 is formed in the head. In rear of the teeth upon the upper side of the head a boss 6 is formed, and the same is countersunk to receive a screw hereinafter described. The head is embraced by an inverted U-shaped yoke 7, whose upper end is provided with a threaded perforation 8, and through the latter there is passed an adjusting -screw 9, whose upper end terminates in a Vsuitable head designed to be operated bythe thumb land forefinger of the'operator, and Whose lower or inner end takes'into the countersink -or cavityformed in the boss and by a `manipulation of thescrew, it will be'obvious that the yoke may be adjusted upon the head or rather the` head adjusted in the yoke.

The terminals of the. yoke embracethe headl l binding-chain 15, and the same consists of a series of links 16, each one of which is reduced at opposite sides, at one end perforated, and provided upon its upper side with a shoulder 17,

and at its opposite end is widenedand bifurcated, forming perforated lugs 18, the perforated lugs of one link-embracing the reduced shouldered" end of the adjacent link, the two being pivoted by pins 20. i

Other forms of links maybe readily devised and employed.' As for instance, in the modied construction thereof villustrated in Fig." y4, I employ a series of metal blocks 2l, the

same terminating at one en d in anabrupt y shoulder 22.

These blocks are of the same Width throughouttheir length, and are loosely l connected by opposite side links v23, through which fand the blocks pivoting-pins 24. are passed.

In the operation of my invention, the chain is passed about the pipe and any surplus that may occur passes through and between the links 11, the lever being swung at an angle to the yoke and drawn upward so that the lower part of its inclined slot is adjacentto 'the pintle 10. Whenthe chain has been placed in position,in order to engage the same with one of the teeth of the stock or lever, it is simply necessary to swing the lever toward the yoke, which brings its teeth toward the chain, and one of its teeth will engage a con-- venient shoulder of the chain. t Any fine adjustments that may be required in order to effect an engagement may be readily pro- IOC cured through the iiiedinm of the adjustingscrew. After having engaged the chain it is simply necessary to swing the lever, and the chain being bound snugly upon the pipe throughout the circumference of the latter, will serve to rotate the pipe in a manner that will be obvious.

Certain changes in the details of construction of my invention may be made without departing from the spirit thereof or sacrificing any of the advantages, and l therefore do not limit myself to such precise details as are herein shown and described.

Having described my invention, what I claim is Y 1. In a pipe-wrench, the combination with a lever terminating at its lower end in a head,

provided with a peripheral tooth, of a binding-chain loosely connected eccentrically to thehead each of the links of the chain provided upon its outer sidewith an abrupt' shoulder adapted to be engaged by said tooth,

y substantially as specified.

2. In a pipe-wrench, the combination with a lever terminating at its lower end in a head andhavin g a plurality of peripheral teeth, of a chain eccentrically and loosely connected with the head of said lever, each of the links of said chain being provided upon its outer side with shoulders for engagement by the teeth, substantially as specified.

3. In`a pipe-wrench, the combination with a lever terminating at its lower end in an en'- larged head, provided with a tooth, of a pair of loose links pivotally and eccentrically connected with the head, a chain the links of which have a series of shoulders for engagement by the tooth, a bolt passed through the links and the inner end of the chain, and a thumb-,nut arranged upon the bolt, substantially as specified.

4. In a pipe-wrench, the combination with a lever terminating at its lower end in an enlarged head having a tooth, an inclined slot arranged in the head, a pintle arranged in the slot and adapted for movement therein, links hung upon the pintle, a bolt passed through the lower ends of the links, and a thumbnut for the bolt, of a chain having shoulders adapted to be engaged by the teeth and removably and loosely connected to the link by means of said bolt, substantially as specified. 5. In a pipe-wrench, the combination with a lever terminating at its lower end in an en' larged head provided with teeth and eccentrically located, an inclined slot, and back of the same. provided with a countersunk boss, an inverted U-shaped yoke embracing the head, and having a threaded perforation at its upper end, an adj listing-screw arranged in the perforation and entering the countersunk boss, aV pintle arranged in the inclined slot and connecting the terminals of the yokes, and a chain loosely connected with said pintle and having its links provided with shoulders adapted to be engaged by the teeth of the lever, substantially as specified. U

6. In a pipe-wrench, the combination with a lever, terminating at its lower end in an enlarged head havingy a plurality of teeth, an

` eccentric, inclined slot, and back of the'same provided with a countersunk boss, an inverted U-shaped yoke embracing the head, a pintle f passing through the' same and the slot, an adjusting-screw passing through the upper end of the yoke and engaging the countersunk boss, a pair of links loosely hung upon the pintle, a transverse bolt, athumb-nut arranged upon the bolt, and a binding-chain, the links of which are provided with shoulders for engaging the teeth of the lever connected with the bolt, substantially as specified. I

7. In a pipe-wrench, the combination with a handle terminating at its lower end in a head provided with teeth, of the binding chain loosely andl eccentrically connected with the head, said chain consisting of a series of links having their opposite ends perforated, one end being reduced at opposite sides and provided upon its upper side with a shoulder,

ing and pivoted to the reduced end of the adjacent link, su-bstantially as specified.

In testimony that I claim the foregoing as my own lI have hereto affixed my signature 1n the presence of two witnesses.

LEOPOLD DAHLSTROM. -Witnesses:

W. E. WADAMS, A. A. WITHROW.

' and the opposite end bifurcated and embrac- 

